JP2772114B2 - Water injection diesel engine - Google Patents
Water injection diesel engineInfo
- Publication number
- JP2772114B2 JP2772114B2 JP2133574A JP13357490A JP2772114B2 JP 2772114 B2 JP2772114 B2 JP 2772114B2 JP 2133574 A JP2133574 A JP 2133574A JP 13357490 A JP13357490 A JP 13357490A JP 2772114 B2 JP2772114 B2 JP 2772114B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- water
- injection
- valve
- amount
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
- F02M43/04—Injectors peculiar thereto
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
- F02B47/02—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being water or steam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は水噴射ディーゼルエンジンに関する。The present invention relates to a water-injected diesel engine.
ディーゼルエンジンの排ガス中の窒素酸化物（NOx）
を低減させる手段として、従来燃料中に水を混入させた
り、エマルジョン燃料を用いたり、燃料とは別に燃焼室
内に水を独立して噴射させる水添加ディーゼルエンジン
等が有効であることは公知の事実である。Nitrogen oxides (NO x ) in exhaust gas from diesel engines
It is a known fact that water is conventionally mixed with fuel, an emulsion fuel is used, or a water-added diesel engine that independently injects water into the combustion chamber separately from the fuel is effective as a means for reducing fuel consumption. It is.
しかしながら、前記手段による場合は、燃料と水を混
入させるための添加剤を要したり、水を燃焼室内に噴射
させるための新たな噴射装置を要するなど、実用性に乏
しいという欠点があった。However, in the case of using the above-mentioned means, there is a drawback that it is not practical, such as requiring an additive for mixing fuel and water, and a new injection device for injecting water into the combustion chamber.
さらにエンジンの性能面においても、水添加量を増大
するにも拘らず、NOxの低減効果が十分でなかったり、
水添加量の増大によって排気黒煙の増大や燃料消費率の
悪化をもたらす等、水添加の効果を十分に見出すに至っ
ていない。Further also in terms of performance of the engine, despite the increase of water amount, or not a reduction of the NO x sufficiently,
The effect of water addition has not yet been found sufficiently, such as an increase in the amount of water addition leading to an increase in exhaust black smoke and a deterioration in fuel consumption rate.
本発明の目的は前記従来装置の問題点を解消し、従来
の燃料システムを大きく変更することなく、コンパクト
で実用性が高く、またエンジンの起動時や停止時には容
易に水噴射が停止できると共に、ディーゼルエンジンの
排ガス中の窒素酸化物（NOx）を低減し、かつエンジン
の排気黒煙や燃料消費率の低減をも同時に達成できる信
頼性の高い水噴射ディーゼルエンジンを提供するにあ
る。The object of the present invention is to solve the problems of the conventional device, without significantly changing the conventional fuel system, compact and highly practical, and can easily stop water injection when starting or stopping the engine, It is an object of the present invention to provide a highly reliable water-injection diesel engine capable of reducing nitrogen oxides (NO x ) in exhaust gas of a diesel engine and simultaneously reducing black smoke and fuel consumption of the engine.
本発明の水噴射ディーゼルエンジンは、燃料および水
を１つの燃料噴射弁から同時に噴射できるようにしたも
ので、特開昭63−227951号公報（特願昭62−59816）に
開示されている「２種燃料エンジンの噴射システム」の
一部を改造したものであり、次のような構成よりなって
いる。The water-injected diesel engine of the present invention allows fuel and water to be injected simultaneously from one fuel injection valve, and is disclosed in Japanese Patent Application Laid-Open No. 63-227951 (Japanese Patent Application No. 62-59816). A part of the "two-fuel engine injection system" is modified and has the following configuration.
請求項１の発明は、燃料と水を燃焼室に噴射する水噴
射ディーゼルエンジンにおいて、燃料ポンブと連通する
燃料供給路と逆止弁を内蔵しかつ該燃料供給路と合流す
る水供給路とを有する燃料噴射弁と、燃料噴射ポンプが
休止している間に所定量の水を上記水供給路を通じて合
流部から燃料供給路内に供給する手段とを備えるととも
に、上記燃料噴射弁の油溜部の容積と上記合流部から油
溜部までの容積との合計が全燃料噴射量の５％以上7.5
％以下であることを特徴とする水噴射ディーゼルエンジ
ンであり、請求項２の発明は、請求項１の発明におい
て、合流部から燃料供給路内に供給される水の量が全燃
料噴射量に対して10〜80％の容積比であることを特徴と
する水噴射ディーゼルエンジンである。According to a first aspect of the present invention, in a water-injection diesel engine for injecting fuel and water into a combustion chamber, a fuel supply path communicating with a fuel pump and a water supply path incorporating a check valve and merging with the fuel supply path are provided. And a means for supplying a predetermined amount of water from the junction through the water supply path into the fuel supply path while the fuel injection pump is stopped, and an oil reservoir of the fuel injection valve. The sum of the volume of the fuel and the volume from the junction to the oil reservoir is 5% or more of the total fuel injection amount.
% Or less, and the invention of claim 2 is the invention of claim 1, wherein the amount of water supplied from the junction to the fuel supply path is reduced to the total fuel injection amount. A water-injected diesel engine characterized by having a volume ratio of 10 to 80%.
主燃料噴射ポンプの吐出が開始されて燃料噴射弁内の
燃料及び水が圧縮され、その圧力が上昇して燃料噴射弁
の開弁圧Po以上になると、燃料噴射弁が開かれ噴射が開
始される。The discharge of the main fuel injection pump is started fuel and water in the fuel injection valve is compressed, when the pressure is equal to or greater than the opening pressure P o of the fuel injection valve rises, the fuel injection valve is opened injection start Is done.
該噴射は、先ず全燃料噴射量の５％以上75％以下の燃
料が燃焼室内に噴射され、着火遅れ期間を経た後燃焼を
開始する。同時に引続いて供給された水が燃焼中の先行
燃料噴霧火炎をめがけて噴射される。このとき噴射され
る水自身も噴霧となってその内部に燃焼室内の空気をと
り込んでいるため、先行噴射された燃料に空気を供給す
る形となって燃焼が活発化される。In this injection, first, fuel of 5% to 75% of the total fuel injection amount is injected into the combustion chamber, and combustion starts after an ignition delay period. At the same time, subsequently supplied water is injected at the preceding fuel spray flame during combustion. At this time, the injected water itself also becomes a spray and takes in the air in the combustion chamber into the inside thereof, so that the air is supplied to the fuel previously injected, and the combustion is activated.
最後に残りの燃料が、先行した水噴霧の中に噴射され
燃焼する。かかる燃料と水の噴射に伴なう熱的影響によ
り火炎の温度上昇が抑えられNOxの発生が抑制される。Finally, the remaining fuel is injected into the preceding water spray and burns. Occurrence of temperature rise of the flame is suppressed NO x is suppressed by accompanying thermal effects the injection of such fuel and water.
このような燃焼プロセスにより、先行噴射された燃料
の量が燃焼性能の良否およびNOx発生の抑制に大きな影
響を及ぼし、先行燃料の量が少なすぎると後続水噴射の
熱的影響により着火後の燃焼持続が困難となり燃焼変動
や燃焼不良を引起し、逆に先行燃料が多過ぎると、先行
燃料の燃焼によるNOxの発生が多くなって、水噴射によ
るNOx発生の抑制効果が減殺される。Such combustion process preceding the amount of injected fuel a significant impact on the suppression of quality and NO x generation in combustion performance, the amount of the preceding fuel is too small after ignited by thermal influence of the succeeding water injection and causing combustion fluctuation and poor combustion becomes difficult combustion duration, if the preceding fuel Conversely too much, generation of the NO x from the combustion of the preceding fuel becomes large, suppression of the NO x generation by water injection is offset .
本発明に係る燃料・水噴霧システムを用いたエンジン
の燃焼試験の結果NOxの発生を効果的に抑制し、かつエ
ンジンの排気黒煙や燃料消費率の低減を同時に達成でき
るため燃料の水噴霧装置の適用範囲としては、全燃料噴
射量の５％以上75％以下の燃料が先に噴射され、引続い
て（全燃料噴射量に対して10％ないし80％の容積比の）
水の全量が噴射され、最後に残りの燃料が全量噴射され
るのが必要条件であることが見出された。Water spray fuel for the generation of results NO x combustion tests of the engine using a fuel-water spray system according to the present invention effectively suppressed, and the reduction of exhaust black smoke and fuel consumption rate of the engine can be achieved at the same time The applicable range of the device is that 5% or more and 75% or less of the total fuel injection amount is injected first, followed by 10% to 80% of the total fuel injection volume.
It has been found that it is a requirement that the entire amount of water be injected, and finally that the remaining fuel be injected in full.
さらに本発明に係る水噴射装置では、エンジンの起動
や停止時など水添加によりエンジンに対し不具合を生じ
る運転状態においては、水供給経過のコントロール装置
の作動を停止することにより、容易に水供給を停止で
き、燃料のみの運転に切換えることができる。Further, in the water injection device according to the present invention, in an operation state in which the addition of water causes a problem with the engine such as when starting or stopping the engine, the water supply can be easily performed by stopping the operation of the control device of the water supply progress. It can be stopped and switched to fuel-only operation.
以下第１〜４図を参照し、本発明の一実施例について
説明する。An embodiment of the present invention will be described below with reference to FIGS.
第１図は本発明の第１実施例に係わる水噴射ディーゼ
ルエンジンの燃料・水噴射装置の要部断面図、第２図は
燃料・水噴射弁の断面図、第３図は燃料及び水の噴射状
況を示す説明図、第４図は同装置の試験結果の説明図で
ある。FIG. 1 is a sectional view of a main part of a fuel / water injection device for a water-injection diesel engine according to a first embodiment of the present invention, FIG. 2 is a sectional view of a fuel / water injection valve, and FIG. FIG. 4 is an explanatory diagram showing an injection situation, and FIG. 4 is an explanatory diagram of a test result of the same device.
１は燃料タンク、２は燃料給油ポンプ、３は燃料噴射
ポンプの本体、４はプランジャ、５はプランジャバレ
ル、６は吐出弁、７は該吐出弁６の側路に設けられた逆
止調圧弁、８は燃料噴射管、40は燃料・水噴射弁で、９
はこれの本体、10は噴孔、11は針弁、12は油溜部、14は
針弁11の付勢ばねである。1 is a fuel tank, 2 is a fuel supply pump, 3 is a main body of a fuel injection pump, 4 is a plunger, 5 is a plunger barrel, 6 is a discharge valve, and 7 is a check pressure regulating valve provided on a bypass of the discharge valve 6. , 8 is a fuel injection pipe, 40 is a fuel / water injection valve, 9
Is a main body thereof, 10 is an injection hole, 11 is a needle valve, 12 is an oil reservoir, and 14 is a biasing spring of the needle valve 11.
一方、19は水タンク、18は水供給ポンプ、17は水供給
管、16は水の供給を制御する制御弁、15は水供給管、13
は水供給の逆止弁で水の制御弁側への逆流を防止する。
また、20は水の供給量および供給時期を制御するコント
ロール装置で、エンジンのクランク角信号およびその他
のエンジン作動条件が入力されて、制御弁16にその開閉
信号を回線23を介して出力する。On the other hand, 19 is a water tank, 18 is a water supply pump, 17 is a water supply pipe, 16 is a control valve for controlling water supply, 15 is a water supply pipe, 13
Is a check valve for water supply, which prevents backflow of water to the control valve side.
Reference numeral 20 denotes a control device for controlling the amount and timing of supply of water. The control device receives a crank angle signal of the engine and other engine operating conditions, and outputs an open / close signal of the control valve 16 via a line.
燃料、水噴射弁40の本体９には燃料通路22が穿孔され
ており、該燃料通路22により、燃料噴射管８および燃料
・水噴射弁40の油溜部12を連通させている。また水供給
路21に設けられた逆止弁13は、同じく燃料・水噴射弁40
の本体９に穿孔された水通路30を介して上部の燃料通路
22の途中の合流部31に接続されている。A fuel passage 22 is perforated in the main body 9 of the fuel / water injection valve 40, and the fuel passage 22 connects the fuel injection pipe 8 and the oil reservoir 12 of the fuel / water injection valve 40. The check valve 13 provided in the water supply passage 21 is also provided with a fuel / water injection valve 40.
Upper fuel passage through a water passage 30 drilled in the body 9
It is connected to a junction 31 in the middle of 22.
ここで合流部31の位置は、第２図に示すように燃料通
路22のうちの前記合流部31から油溜部12までの容積をV1
とし、針弁11が閉じられた状態での油溜部12の容積をV2
とし、また１回の燃料の全噴射量をVFとしたとき となるように合流点31の位置を設定する。Here, the position of the junction 31 is determined by setting the volume of the fuel passage 22 from the junction 31 to the oil reservoir 12 to V 1 as shown in FIG.
And the volume of the oil reservoir 12 with the needle valve 11 closed is V 2
And the total amount of fuel injected at one time is V F The position of the junction 31 is set so that
さらに逆止調圧弁７、逆止弁13、燃料噴射弁の針弁11
の開弁圧をそれぞれPR,PP,POとしたとき、PO＞PR,PO＞P
Pとなるように設定されている。Further, a check valve 7, a check valve 13, and a needle valve 11 of a fuel injection valve are provided.
Where P R , P P , and P O are valve opening pressures, respectively, P O > P R , P O > P
It is set to be P.
次に前記実施例の作用について説明する。 Next, the operation of the above embodiment will be described.
水タンク19より水供給ポンプ18によって圧送された水
は、供給管17を通り制御弁16へ送られる。燃料噴射ポン
プ３のプランジャ４が燃料の圧送を行なっていない休止
期間中に、前記制御弁16は、コントローラ装置20を介し
て所定の期間開弁状態に保持され、所定量の水を供給管
15を介して燃料・水噴射弁40の水供給路21に送り込む。
このとき、前記のとおり燃料噴射ポンプ３の逆止調整弁
７の開弁圧力PRおよび水供給路21の逆止弁13の開弁圧を
PPとする時、針弁11の開弁圧POに対して PO＞PR,PO＞PP と設定されているので、供給された水は逆止弁13を経て
水通路30および合流部31を通り燃料通路22内に流入す
る。The water pumped from the water tank 19 by the water supply pump 18 is sent to the control valve 16 through the supply pipe 17. During a rest period in which the plunger 4 of the fuel injection pump 3 is not pumping fuel, the control valve 16 is kept open for a predetermined period via the controller device 20 to supply a predetermined amount of water to the supply pipe.
The water is supplied to the water supply passage 21 of the fuel / water injection valve 40 through the fuel supply valve 15.
At this time, the valve opening pressure of the check valve 13 of the opening pressure P R and the water supply path 21 of the check regulator valve 7 of the fuel injection pump 3 as described above
When P P is set, P O > P R , P O > P P with respect to the valve opening pressure P O of the needle valve 11, so that the supplied water passes through the check valve 13 through the water passage 30. And flows into the fuel passage 22 through the junction 31.
燃料通路22内の合流部31より上流側すなわち燃料噴射
ポンプ３側にある燃料は、燃料噴射ポンプ３の方向に噴
射管８を通って押しもどされ、逆止調整弁７を押し開い
てプランジャ室へ逆流する。The fuel upstream of the junction 31 in the fuel passage 22, that is, on the side of the fuel injection pump 3, is pushed back through the injection pipe 8 in the direction of the fuel injection pump 3 and pushes the check valve 7 open to open the plunger chamber. Backflow to
その結果、第２図に示すように燃料・水噴射弁40内に
は、油溜部12の容積V2および合流部31から油溜部12まで
の燃料通路22の容積V1の和であるV1＋V2の容積の燃料で
満され、前記合流部31の上流側の燃料通路22内には所定
量の水が満され、さらにその上流には再び燃料が満され
た状態となっている。As a result, in the fuel and water injection valve 40 as shown in FIG. 2, is the sum of the volume V 1 of the fuel passage 22 from the volume V 2 and the merging section 31 of the oil reservoir 12 to the oil reservoir 12 The fuel is filled with a volume of V 1 + V 2, a predetermined amount of water is filled in the fuel passage 22 on the upstream side of the junction 31, and the fuel is filled again on the upstream side. .
つぎに燃料ポンプ３のプランジャ４が上昇して燃料の
圧縮が開始されると、噴射管８、燃料通路22および油溜
部12内の圧力が上昇し、針弁11の開弁圧PO以上になると
針弁11が開かれる。このとき逆止弁13の作用により水通
路30内の水は水タンク19側へは押し戻されることはな
い。Next, when the plunger 4 of the fuel pump 3 is raised to start compressing the fuel, the pressure in the injection pipe 8, the fuel passage 22, and the oil reservoir 12 is increased, and the valve opening pressure P O of the needle valve 11 is increased. , The needle valve 11 is opened. At this time, the water in the water passage 30 is not pushed back to the water tank 19 by the action of the check valve 13.
針弁11が開弁圧POに達すると、第３図のように燃料・
水噴射弁40の噴孔10からは、まず油溜部12および燃料通
路22内の合流部31までの容積に満されていたV1＋V2の容
積の燃料が噴射され、続いて所定量供給されていた水が
噴射され、最後に残りの燃料が全量噴射されることとな
る。１回の噴射で噴射される燃料の量をQFとすると、最
初に噴射される燃料の量QFPは前述のようにQFP＝V1＋V2
となり、続いてQWの水の全量が噴射され、最後に残りの
燃料をQFSとするとQFS＝QF−QFPが噴射される。When the needle valve 11 reaches the valve opening pressure P O , as shown in FIG.
From the injection hole 10 of the water injection valve 40, first, a fuel of V 1 + V 2 which is full of the volume up to the oil reservoir 12 and the confluence 31 in the fuel passage 22 is injected, and then a predetermined amount of fuel is supplied. The water that has been discharged is injected, and finally the remaining fuel is completely injected. When the amount of fuel injected by one injector and Q F, the amount of fuel initially injected Q FP, as described above Q FP = V 1 + V 2
Next, followed by the total amount of water Q W is injected, the last remaining fuel when the Q FS to Q FS = Q F -Q FP is injected.
本実施例にもとずくエンジンを用い前記合流点31の位
置を変えて燃料噴射量QFPおよび水供給路QWを変化させ
て試験し、その結果をQW/QFをパラメータとし、横軸にQ
FP/QF、縦軸に煙濃度、又はNOxの変化率をとり整理した
結果を第４図（ａ），（ｂ）に示す。In this embodiment by changing the position of the meeting point 31 using the original Nuisance engine tested by changing the fuel injection amount Q FP and the water supply path Q W, and the results of the Q W / Q F as a parameter, transverse Q on axis
FIGS. 4 (a) and 4 (b) show the results obtained by plotting FP / Q F and the change rate of smoke density or NO x on the vertical axis.
図においてパラメータの水供給割合QW/QFを増大する
に従ってエンジン排ガス中のNOxおよび煙濃度の低減が
得られ、かつ先行噴射燃料割合QFP/QFが５％以上75％以
下の範囲でその低減効果が顕著であることを見出した。
また図中×印はその点よりもQFP/QFが少ない領域では失
火や燃焼変動による正常なエンジン運転が困難となる点
を示す。QW/QFが80％以上となるとQFP/QFの大きいとこ
ろでしか正常運転は得られず、またNOxの低減量も頭打
となることから、QW/QFは10％以上80％以下の範囲が効
果的である。NO x and reduce the smoke density is obtained and the preceding fuel injection ratio Q FP / Q range F is below 75% 5% or more of engine exhaust gas according to increase the water supply rate Q W / Q F parameters in FIG. It was found that the reduction effect was remarkable.
In the figure, the crosses indicate points where normal engine operation becomes difficult due to misfire or combustion fluctuation in a region where Q FP / Q F is smaller than that point. When Q W / Q F is 80% or more, normal operation can be obtained only in the area where Q FP / Q F is large, and the reduction of NO x also reaches a plateau, so Q W / Q F is 10% or more. A range of 80% or less is effective.
以上の結果よりディーゼルエンジンにおいて、燃料お
よび水を同一燃料噴射弁から同時に噴射できるようにし
た本実施例の燃料水噴射装置において、１回の噴射にお
いて、全燃料噴射量の５％以上75％以下の燃料が先に噴
射され、引続いて全燃料噴射量に対し10％ないし80％の
容積比の水の全量が噴射され、最後に残りの燃料が全量
噴射されるように燃料・水噴射弁の油路形状および水供
給の位置を設定することにより、ディーゼルエンジンの
排気中のNOxの低減および煙濃度低減を効果的に実現す
ることができ、かつ燃焼改善による燃費低減も得られ
る。From the above results, in the fuel water injection device of the present embodiment, in which the fuel and water can be simultaneously injected from the same fuel injection valve in the diesel engine, in one injection, 5% or more and 75% or less of the total fuel injection amount The fuel / water injection valve is injected such that the fuel is injected first, followed by 10% to 80% of the total fuel injection amount by volume of water, and finally the remaining fuel is injected by the entire amount. by setting the position of the oil passage configuration and water supply, it is possible to effectively realize a reduction and smoke density reduction of the NO x in the exhaust of a diesel engine, and also obtained fuel consumption due to improved combustion.
また本実施例以外の構成からなる装置においても、本
発明で明らかになったように燃料と水を同一の噴射弁か
ら噴射し、かつ１回の噴射中に全燃料噴射量の５％以下
75％以下の燃料が先に噴射され、引続いて水の全量が噴
射され最後に残りの燃料が全量噴射されるようにするこ
とにより、本実施例と同一の効果が得られるものであ
る。Also, in an apparatus having a configuration other than that of the present embodiment, fuel and water are injected from the same injection valve as described in the present invention, and 5% or less of the total fuel injection amount during one injection.
The same effect as that of the present embodiment can be obtained by injecting 75% or less of fuel first, subsequently injecting the entire amount of water, and finally injecting the remaining amount of fuel.
本発明の水噴射ディーゼルエンジンは前記のとおり構
成したので、排気中の窒素酸化物（NOx）を効果的に低
減できると共に、排気黒煙や燃料消費率の低減を同時実
現することができる。Since the water-injection diesel engine of the present invention is configured as described above, it is possible to effectively reduce nitrogen oxides (NO x ) in exhaust gas and simultaneously reduce exhaust black smoke and fuel consumption rate.
第１図は本発明の燃料・水噴射装置の構成断面図、第２
図は燃料・水噴射弁の断面図、第３図は同噴射状況説明
図、第４図は試験結果の性能曲線図である。 ３……燃料噴射ポンプ本体、４……プランジャ、７……
逆止調圧弁、11……針弁、12……油溜部、13……逆止
弁、16……制御弁、20……コントロール装置、21……水
通路、22……燃料通路、30……水通路、31……合流点、
40……燃料・水噴射弁。FIG. 1 is a sectional view showing the structure of a fuel / water injection device according to the present invention, and FIG.
FIG. 3 is a sectional view of the fuel / water injection valve, FIG. 3 is an explanatory view of the injection situation, and FIG. 4 is a performance curve diagram of test results. 3 ... fuel injection pump body, 4 ... plunger, 7 ...
Check pressure regulating valve, 11 Needle valve, 12 Oil reservoir, 13 Check valve, 16 Control valve, 20 Control device, 21 Water passage, 22 Fuel passage, 30 ... water passage, 31 ... confluence,
40 ... Fuel / water injection valve.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｆ０２Ｍ 25/02 Ｈ (58)調査した分野(Int.Cl.6，ＤＢ名) F02M 43/00 F02B 47/02 F02M 25/02 F02D 19/12──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 identification code FI F02M 25/02 H (58) Field of investigation (Int.Cl. 6 , DB name) F02M 43/00 F02B 47/02 F02M 25 / 02 F02D 19/12
Claims (2)
ゼルエンジンにおいて、燃料ポンプと連通する燃料供給
路と逆止弁を内蔵しかつ該燃料供給路と合流する水供給
路とを有する燃料噴射弁と、燃料噴射ポンプが休止して
いる間に所定量の水を上記水供給路を通じて合流部から
燃料供給路内に供給する手段とを備えるとともに、上記
燃料噴射弁の油溜部の容積と上記合流部から油溜部まで
の容積との合計が全燃料噴射量の５％以上75％以下であ
ることを特徴とする水噴射ディーゼルエンジンの燃料・
水噴射装置。1. A water-injection diesel engine for injecting fuel and water into a combustion chamber, the fuel having a fuel supply passage communicating with a fuel pump and a water supply passage incorporating a check valve and merging with the fuel supply passage. An injection valve, and a means for supplying a predetermined amount of water from the junction to the fuel supply path through the water supply path while the fuel injection pump is stopped, and a volume of an oil reservoir of the fuel injection valve. And wherein the sum of the volume from the junction to the sump is from 5% to 75% of the total fuel injection amount.
Water injection device.
内に供給される水の量が全燃料噴射量に対して10〜80％
の容積比であることを特徴とする水噴射ディーゼルエン
ジン。2. The fuel injection system according to claim 1, wherein the amount of water supplied from the junction to the fuel supply path is 10 to 80% of the total fuel injection amount.
A water-injection diesel engine characterized by a volume ratio of:
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2133574A JP2772114B2 (en) | 1990-05-23 | 1990-05-23 | Water injection diesel engine |
| DK91102018.8T DK0459083T3 (en) | 1990-05-23 | 1991-02-13 | Diesel engine with water injection |
| DE199191102018T DE459083T1 (en) | 1990-05-23 | 1991-02-13 | DIESEL ENGINE WITH WATER INJECTION. |
| EP91102018A EP0459083B1 (en) | 1990-05-23 | 1991-02-13 | Water-injection diesel engine |
| DE69104265T DE69104265T2 (en) | 1990-05-23 | 1991-02-13 | Diesel engine with water injection. |
| KR1019910008212A KR940009683B1 (en) | 1990-05-23 | 1991-05-22 | Water-injection diesel engine |
| US07/785,078 US5170751A (en) | 1990-05-23 | 1991-10-30 | Water-injection diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2133574A JP2772114B2 (en) | 1990-05-23 | 1990-05-23 | Water injection diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0427757A JPH0427757A (en) | 1992-01-30 |
| JP2772114B2 true JP2772114B2 (en) | 1998-07-02 |
Family
ID=15107995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2133574A Expired - Lifetime JP2772114B2 (en) | 1990-05-23 | 1990-05-23 | Water injection diesel engine |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0459083B1 (en) |
| JP (1) | JP2772114B2 (en) |
| KR (1) | KR940009683B1 (en) |
| DE (2) | DE459083T1 (en) |
| DK (1) | DK0459083T3 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002155825A (en) * | 2000-11-16 | 2002-05-31 | Mitsubishi Heavy Ind Ltd | Fuel/water-injection internal combustion engine |
| JP2002202007A (en) * | 2000-12-28 | 2002-07-19 | Mitsubishi Heavy Ind Ltd | Fuel/water injecting internal combustion engine |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4126705C2 (en) * | 1991-08-13 | 1994-08-04 | Man B & W Diesel Ag | Method and device for reducing nitrogen oxide emissions from internal combustion engines |
| US5174247A (en) * | 1992-01-22 | 1992-12-29 | Mitsubishi Jukogyo Kabushiki Kaisha | Water injection diesel engine |
| DE4230641A1 (en) * | 1992-09-12 | 1994-03-17 | Bosch Gmbh Robert | Fuel injector with additive injection for diesel engines |
| DE4337048C2 (en) * | 1993-10-29 | 1996-01-11 | Daimler Benz Ag | Fuel injection system for an internal combustion engine |
| DE19754515A1 (en) * | 1997-12-09 | 1999-06-10 | Bosch Gmbh Robert | Fuel injection valve |
| JP3861479B2 (en) * | 1998-01-21 | 2006-12-20 | 三菱ふそうトラック・バス株式会社 | Water injection amount control device for fuel / water injection engines |
| DE10200664A1 (en) * | 2002-01-11 | 2003-07-24 | Opel Adam Ag | Water injection system for inlet and exhaust valves of internal combustion engine has rings of porous sintered material surrounding valve seats |
| DE10315149A1 (en) * | 2003-04-03 | 2004-10-14 | Daimlerchrysler Ag | Internal combustion engine with auto-ignition |
| DE10330511A1 (en) * | 2003-07-05 | 2005-02-10 | Man B & W Diesel Ag | Internal combustion engine |
| JP6186967B2 (en) | 2013-07-10 | 2017-08-30 | スズキ株式会社 | Outboard gearbox |
| JP6186968B2 (en) | 2013-07-10 | 2017-08-30 | スズキ株式会社 | Outboard gearbox |
| DK179162B1 (en) * | 2016-05-02 | 2017-12-18 | Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland | An internal combustion engine of two-stroke crosshead type, and a method of direct injection of fuel and water into a combustion chamber |
| DE102016112735A1 (en) | 2016-07-12 | 2018-01-18 | Ingo Kolsch | Method and device for improving the combustion process, in particular in an internal combustion engine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3933132A (en) * | 1971-10-20 | 1976-01-20 | Isuzu Motors Limited | Another liquid-mixing injection system for internal-combustion engine |
| JP2538908B2 (en) * | 1987-03-15 | 1996-10-02 | 三菱重工業株式会社 | Two-fuel engine injection system |
| DE3931456A1 (en) * | 1989-09-21 | 1991-04-04 | Bosch Gmbh Robert | INJECTION DEVICE FOR DIESEL ENGINES |
| JP2841552B2 (en) * | 1989-09-29 | 1998-12-24 | いすゞ自動車株式会社 | Fuel injection system for sub-chamber insulated engine |
-
1990
- 1990-05-23 JP JP2133574A patent/JP2772114B2/en not_active Expired - Lifetime
-
1991
- 1991-02-13 DK DK91102018.8T patent/DK0459083T3/en active
- 1991-02-13 DE DE199191102018T patent/DE459083T1/en active Pending
- 1991-02-13 EP EP91102018A patent/EP0459083B1/en not_active Expired - Lifetime
- 1991-02-13 DE DE69104265T patent/DE69104265T2/en not_active Expired - Fee Related
- 1991-05-22 KR KR1019910008212A patent/KR940009683B1/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002155825A (en) * | 2000-11-16 | 2002-05-31 | Mitsubishi Heavy Ind Ltd | Fuel/water-injection internal combustion engine |
| JP4550991B2 (en) * | 2000-11-16 | 2010-09-22 | 三菱重工業株式会社 | Fuel / water injection internal combustion engine |
| JP2002202007A (en) * | 2000-12-28 | 2002-07-19 | Mitsubishi Heavy Ind Ltd | Fuel/water injecting internal combustion engine |
| JP4508411B2 (en) * | 2000-12-28 | 2010-07-21 | 三菱重工業株式会社 | Fuel / water injection internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| KR910020311A (en) | 1991-12-19 |
| KR940009683B1 (en) | 1994-10-15 |
| DK0459083T3 (en) | 1995-04-03 |
| JPH0427757A (en) | 1992-01-30 |
| DE69104265T2 (en) | 1995-03-02 |
| EP0459083B1 (en) | 1994-09-28 |
| EP0459083A1 (en) | 1991-12-04 |
| DE459083T1 (en) | 1992-03-19 |
| DE69104265D1 (en) | 1994-11-03 |
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